CBRS EVALUATION SET QUESTIONS AND ANSWERS
SURE A+
✔✔What are the main antenna parameters that you should know? - ✔✔Azimuth,
downtilt, gain and beamwidth
✔✔Azimuth - ✔✔The aiming degree relative to north at 0 degrees.
✔✔What is the azimuth specified for an omnidirectional antenna? - ✔✔0 degrees
✔✔Gain - ✔✔ratio of actual radiated power to conducted power specified as a number
between -127dBi and 128dBi.
✔✔How do you convert dBd to dBi? - ✔✔add 2.15 to your dBd number to get your dBi.
✔✔ERP - ✔✔Effective Radiated Power
✔✔Beamwidth - ✔✔the degree measure of how wide the antenna pattern is spread.
✔✔What is the beamwidth of an omnidirectional antenna? - ✔✔360 degrees.
✔✔What are the three defined air interfaces and what do they mean? - ✔✔E_UTRA -
LTE Coverage
CAMBIUM_NETWORKS - Proprietary Cambium Waveform
4G_BBW_SAA_1 - IEEE 802.16e
✔✔Air Interface - ✔✔The type of technology used by the CBSD currently being used.
✔✔Measurement Capability - ✔✔The FCC requires any CBSD to be able to measure
and report spectrum occupancy
, ✔✔what are the two currently defined measurement capabilities? -
✔✔RECIEVED_POWER_WITHOUT_GRANT - CBSD can perform measurements
before getting a grant.
RECIEVED_POWER_WITH_GRANT - CBSD can perform measurements while using a
current grant.
✔✔How does Magnetic Declination affect Azimuth? - ✔✔Magnetic Declination is the
difference between magnetic north and true north. a magnetic declination east adds to
the azimuth while a declination west subtracts from the azimuth.
✔✔Explain the two different types of registration. - ✔✔Multi-step:
The CPI inputs information and registers the device with the SAS, then configures the
CBSD.
Single-Step:
The CPI will have to provide information including their CPIR ID, name, and installation
certification timestamp. The information will then need to be signed using the CPI
credentials and given to the CBSD.
✔✔List the possible SAS troubleshooting response codes: - ✔✔101 Blacklisted - The
device model has been banned from operation.
102 Missing Parameter - There are one or more missing parameters.
103 Invalid Value - One or more parameters entered are invalid.
200 Registration Pending - Data that was entered by the CPI is not included in
registration request.
✔✔ SAS - ✔✔Spectrum Access System
✔✔CBRS - ✔✔Citizens Broadband Radio Service
✔✔CPI - ✔✔Certified Professional Installer
✔✔FCC - ✔✔Federal Communications Commission
✔✔What is the purpose of CBRS? - ✔✔CBRS allows a range of RF bandwidth
previously allocated to one licensed user to be shared among many users while
maintaining that low priority users do not interfere with high priority users.
✔✔What RF band does CBRS control? - ✔✔3550 MHz - 3700 MHz
✔✔When and by who was CBRS created? - ✔✔Created by the FCC in 2015
✔✔What is the CBRS vision? - ✔✔150 Mhz of new wireless bandwidth that can be used
for fixed or mobile broadband access.
SURE A+
✔✔What are the main antenna parameters that you should know? - ✔✔Azimuth,
downtilt, gain and beamwidth
✔✔Azimuth - ✔✔The aiming degree relative to north at 0 degrees.
✔✔What is the azimuth specified for an omnidirectional antenna? - ✔✔0 degrees
✔✔Gain - ✔✔ratio of actual radiated power to conducted power specified as a number
between -127dBi and 128dBi.
✔✔How do you convert dBd to dBi? - ✔✔add 2.15 to your dBd number to get your dBi.
✔✔ERP - ✔✔Effective Radiated Power
✔✔Beamwidth - ✔✔the degree measure of how wide the antenna pattern is spread.
✔✔What is the beamwidth of an omnidirectional antenna? - ✔✔360 degrees.
✔✔What are the three defined air interfaces and what do they mean? - ✔✔E_UTRA -
LTE Coverage
CAMBIUM_NETWORKS - Proprietary Cambium Waveform
4G_BBW_SAA_1 - IEEE 802.16e
✔✔Air Interface - ✔✔The type of technology used by the CBSD currently being used.
✔✔Measurement Capability - ✔✔The FCC requires any CBSD to be able to measure
and report spectrum occupancy
, ✔✔what are the two currently defined measurement capabilities? -
✔✔RECIEVED_POWER_WITHOUT_GRANT - CBSD can perform measurements
before getting a grant.
RECIEVED_POWER_WITH_GRANT - CBSD can perform measurements while using a
current grant.
✔✔How does Magnetic Declination affect Azimuth? - ✔✔Magnetic Declination is the
difference between magnetic north and true north. a magnetic declination east adds to
the azimuth while a declination west subtracts from the azimuth.
✔✔Explain the two different types of registration. - ✔✔Multi-step:
The CPI inputs information and registers the device with the SAS, then configures the
CBSD.
Single-Step:
The CPI will have to provide information including their CPIR ID, name, and installation
certification timestamp. The information will then need to be signed using the CPI
credentials and given to the CBSD.
✔✔List the possible SAS troubleshooting response codes: - ✔✔101 Blacklisted - The
device model has been banned from operation.
102 Missing Parameter - There are one or more missing parameters.
103 Invalid Value - One or more parameters entered are invalid.
200 Registration Pending - Data that was entered by the CPI is not included in
registration request.
✔✔ SAS - ✔✔Spectrum Access System
✔✔CBRS - ✔✔Citizens Broadband Radio Service
✔✔CPI - ✔✔Certified Professional Installer
✔✔FCC - ✔✔Federal Communications Commission
✔✔What is the purpose of CBRS? - ✔✔CBRS allows a range of RF bandwidth
previously allocated to one licensed user to be shared among many users while
maintaining that low priority users do not interfere with high priority users.
✔✔What RF band does CBRS control? - ✔✔3550 MHz - 3700 MHz
✔✔When and by who was CBRS created? - ✔✔Created by the FCC in 2015
✔✔What is the CBRS vision? - ✔✔150 Mhz of new wireless bandwidth that can be used
for fixed or mobile broadband access.
